Shears



(No Model.)

W. G. KOELSCH & P. SHAFER.

1 SHEARS.

No. 434,345. Patented Aug. 12, 1890.

WITNESSES IN VE N 70/?8 am, I Z W 01454442 4.45% B) 2 A TTOHNEYS UNITEDSTATES PATENT OFFICE.

WILLIAM GEORGE KOELSCH, or ALBANY, AND PHILIP SHAFER, OF BATH-ON-THE-HUDSON, NEW YORK.

SHEARS.

SPECIFICATION forming part of Letters Patent No. 434,345, dated August12, 1890. Application filed March 24, 1890- Serial No. 345,035. (Nomodel.)

To all whom it may concern.-

Be it known that we, WILLIAM GEORGE KOELSCH, of the city and county ofAlbany, and State of New York, and PHILIP SHAFER, of Bathmn-the-Hudson,in the county of Rensselaer and State of New York, have invented a newand useful Improvement'in Scissors and other like Cutting-Instruments,of which the following is a full, clear, and exact description.

This invention relates to shears or scissors; and it consists in a novelconstruction of the same at the joint, and in the means used to securetension of the two blades in juxtaposition with and as they pass eachother, substantially as hereinafter described, and pointed out in theclaim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 represents a side view of a pair of scissors embodying ourinvention; Fig. 2, a longitudinal edge view of the same; and Fig. 3, asimilar view in part, with one of the blades in section at the joint andturned to a position at right angles with the other blade, which is alsoshown in section at said part, as likewise a locking spring-tensiondevice or catch which engages with the joint-pin. Fig. 4 is aperspective View of said spring device or catch; Fig. 5, a. transversesection of the same on the line w 00 in Fig. 4; and Fig. 6, alongitudinal view of the joint-pin of the implement.

A indicates the one and B the other blade of the scissors or shears,each provided with suitable looped handles.

0 is the joint-pin,which takes the place .of'

the usual rivet upon or with which the blades work as they are opened orclosed. This pin is formed of a head 5, preferably of countersunkconstruction, and a shank c, milled on its opposite sides near its outerend, as shown at d d, or otherwise suitably constructed to engage with aspring-tension device or catch D, that serves to hold the pin in placeand keep the blades at a fixed tension from each other. The joint-pin Ois here shown as entered from the blade side A of the scissors,

and the tension catch or holder D as applied to the other blade 13; butthis may be reversed, as it is immaterial which blade the catch D isapplied to, the invention being suitable for both old and new scissors.

The tension catch or holder D as here constructed consists of a fiatsteel spring, having a key-hole slot 8 in it near its forward end, andmade with turned-down spring projections or clips ff near its oppositeend to grasp or engage with the handle of the blade to which it isapplied. The enlarged portion of the keyhole slot 6 serves to providefor entry of the shank portion 0 of the joint-pin 0 through thespring-tension catch D, and the narrower portion of said slot as thecatch D is shoved up to its place engageswith the recesses or milled-outsides at d of the jointpin 0 to hold said pin to its place and the twoblades in proper relation with each other subject to a fixed tension asproduced by the spring-catch.

By the engagement of the spring-tension catch with the joint-pin, ashere shown, said pin is restrained from turning and the friction andWear thrown upon the head of the pin, to which tension is applied by thespringcatch and is constantly maintained as wear on the head of said pintakes place.

The spring-tension catch or holder D is readily applied and removedagain when it is necessary to take the blades apart for the purpose ofcleaning them at the j ointas, for instance, in the case ofhair-dressers scissors which are apt to clog with hair and dirt at thejoint, and when the blades are put and se-' cured together again therewill be the same tension upon them as before and at all times, so thatthey will pass one another easily, and there is no necessity to have thecurve or set in both blades so accurate. The cutting-edges, too, of theblades are better preserved bythe uniform tension upon the blades, sothat they will last longer and work more satisfactorily.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

The combination, with the cutting-blades opposite end, subst antially asand for the pur- A B, of the joint-pin 0, having a head I) at its poseor pu rposes herein specified.

one end and a shank having reduced flat- WILLIAM GEORGE KOELSCH. tenedsides d near its outer end, and the look- PHILIP SHAFER. 5 ing-springtension catch or holder D, (3011- Witnesses:

structed with a key-hole slot e near its for- FRANCIS H. KIMBALL, wardend and with spring-clips ff near its GEORGE DERR.

